Flushing device.



C. W. DARROW. FLUSHING DEVICE.

APPLICATION FILED APR.5,1912,

Patented Ja11.20, 1914.

UNTER@ STATE@ PTENT UFFCE.

CHARLES W. DARROW, OF GLENVOOD SPRINGS, COLORADO.

FLUSI-IING- DEVICE.

To al? whom t may concern Be it known that I, CHARLEs lV. DAnRow, oit Glenwood Springs, in the county of Garfield and State of Colorado, have invented certain new and useful Improvements in Flushing Devices; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The primary object of this invention is to provide a flushing device which will be noiseless in operation; positive in action, and composed of comparatively few parts. And a further object is to provide a device of this character which may be readily and easily set in motion and automatically closed without wire-drawing'.

The invention will be hereinafter fully set forth and particularly pointed out in the claims.

Figure 1 is a view in perspective showing my device applied to a toilet. Fig. 2 is an enlarged vertical sectional view showing parts in their closed positions. Fig. 3 is a similar view showing the parts unseated. Fig. 11 shows the piston and its coperating art.

p Referring to the drawings, 1 designates a casing; 2 an inlet pipe opening into the bottom of the casing; and 3 an outlet pipe leading from the top of the casing and designed to be connected to a bowl, Within the casing, at a point immediately below the outlet, is a seat f1 for a main valve 5. At its center this valve has a central opening 6 normally closed by an auxiliary valve 7 which latter, like valve 5, is normally held seated by water pressure. By first unseating the small auxiliary valve, the main valve, which is of far greater area, may be unsea'ted with comparatively little exertion on the part of the operator.

After the auxiliary valve has been unseated a further movement thereof will un seat the main valve. For this purpose the auxiliary valve is located on a push rod 8 which extends centrally through the top of the casing, and is provided with a head or butt on its outer end, The main valve carries on its underside, adjacent to its central Specification of Letterslatent.

Application filed April 5, 19124 Patented Jan. 20, 1914.

Serial No. 688,597.

opening, a cage 9 wherein the auxiliary valve is designed to travel, so that when such valve is unseated by pressure on the push rod, its further movement will be communicated to the main valve, and as the pressure is continued both valves will be moved downwardly in unison.

For the purpose of retarding the seating of the main valve, and to render such seating noiseless and without wire-drawing, I provide a specially constructed clash-pot embodying advantages not heretofore attained. The dash-pot comprises a cylinder 12 located centrally within casing 1 at any suitable point between valve-seat 4 and the inlet. This casing is open at its lower end and closed at its top, save for a central opening 13, which I designate a weephole. Cylinder 19. at its upper end is connected by a diaphragm 141 to casing 1, and in this diaphragm are formed openings for the passage of water.

Vithin the cylinder is a piston the distinguishing characteristic of which is that when it is first moved out of its normal position it will immediately allow water to pass back of it into the cylinder, and yet on its return stroke will be retarded by the water in the cylinder behind the piston which escapes slowly through the weep-hole and around the edges of the piston. According to the preferred means of construction, the piston is composed of two parts 15 and 16, or otherwise stated, the piston 15 has an opening which is normally closed by part 16. The part 15 is shown as being of circular formationso as to fit within the cylinder', and having practically one-half of its body cut out to form an Opening which is normally closed by part 16, the periphery of that portion of part 15 having the opening being preserved to form a seat for the part 1G. The latter is mounted on the lower end of the push rod, and the part 15 in the preferred construction has a circular sleeve 17 through which the push rod is passed, and this sleeve is projected through the opening 13 of the cylinder. The downward movement of the sleeve, and hence also that of the piston, is limited by a stop 18 on the upper end of the sleeve. Normally, when valve 5 is closed the two piston parts are at the top or cylinder 12, but as soon as downward pressure is applied to rod 8 the part 16 is moved independently of part 15, and thereby the dash pot is promptly filled with water and the downward movement of the piston is rendered easy, all tendency of a partial vacuum behind 'the piston being thereby obviated. The part 15 remains in its upper position until the cage of valve 5 engages the upper end of sleeve 17, and thereupon the two piston members travel toward the open end oi the cylinder with a uniform separation between them, and at the same time valve 5 is being moved from its seat. When pressure on the rod is released, the in-rushing water acting directly upon the underside of piston part 16, which latter is more than a half circle, immediately forces the latter upward until it engages part 15, and seats the auxiliary valve, and thereafter the two parts, under the pressure of the water acting thereon and on the valves, travel together as a unit and control the gradual seating of the main valve,-

the water within the cylinder escaping slowly through the weep-hole and around the edge of the piston. By means of my present invention the dash-pot quickly fills but empties slowly, thereby retarding the seating of the main valve to allow flushing. 1 prefer to direct the in-rushing water against the underside of the piston part 16, and for this purpose any suitable means may be employed, such as a detlector 19,

lVhile 1 have found in actual practice that the construction so :tar described is highly advantageous, yet substantially the same results may be obtained by diiiz'erent means, and hence 1 do not restrict myself to the particular means shown and described.

1f desired, the sleeve 17 may be shortened and the movement between the parts 15 and 16 coniined to a squared portion 17a of the push rod at its lower end on which the piston part 15 slides, a squared opening therein being prepared to lit the squared portion of the push rod, the length of this squared portion corresponding with the relative movement between the piston 15 and the part 16. This construct-ion presents a shoulder at the point on the push rod where the squared and round portions meet, thus limiting the movement of the part 15 b-et-ween this shoulder and the part 16. This construction also prevents the parts 15 and 16 changing their relative position by any rotary movement. Any suitable means may be employed for limiting the relative movement ot' the piston parts and prevent displacement by a relative rotation.

1 claim as my invention:

1. A flushing device comprising, in combination, a casing having an inlet and an outlet and an internal valve seat, a valve normally held against said seat, a cylinder within said casing open at on-e end and having a weep hole in its other end, a piston in said cylinder' having an opening, a sleeve carried by said piston and extended through said weep hole, a push rod extended through said sleeve and designed to unseat said valve, a member carried by said push rod for normally closing the opening in said piston, and means actuated by said push rod for moving said sleeve and piston when traveling in one direction, said push rod and member having a limited movement independent of the piston.

2. A flushing device comprising, in combination, a casing having an inlet and an outlet and an internal valve seat, a valve normally held against said seat, a cylinder within said casing open at one end, a piston in said cylinder having one-half solid and the other half open, a sleeve carried by said piston and projected through the other end of said cylinder, a push rod for unseating said valve extended through said sleeve and having a member whose area is substantially one-half that of the piston for normally closing the open side thereof, and means for successively unseating said member and actuating said piston when the valve is being unseated.

8. A flushing device comprising, in combination, a casing having an inlet and an outlet and an internal valve seat, a valve normally held against said seat, a cylinder within said casing open at one end and having a weep hole in its other end, a piston in said cylinder having one-half solid and the other halt' open, a sleeve carried by said piston and projected through said weep hole, a push rod for unseating said valve eX- tended through said sleeve and having a member whose area is substantially onehalf that ot the piston for normally closing the open side thereof, and means for successively unseating said member and actuating said piston when the valve is being unseated.

4. .A flushing device comprising a casing having an inlet and an outlet and an internal valve seat, a main valve designed to t against said seat and having a central opening therethrough, an auxiliary valve for normally closing said opening, a stop carried by said main valve with which said auxiliary valve is designed to engage, a push rod carrying said auxiliary valve, a cylinder open at one end and having a weep holeinits other end, a piston in said cylinder having a sleeve extended through said weep hole and in which said push rod is located, said piston having an opening therethrough,'a member carried by said push rod for normally o1os- In testimony whereof, I have signed this ing said opening, said member being respeocation in the presence of two subscrb- 10 moved from said opening when the push 1rod 'ing Witnesses.

is actuated to unseat said aux ar va Ve, i

and .means for causing the push rodyto actu- CHARLES NV' DARROW' ate Said piston after unseatng said member, VVtneSses:

said member being moved to its seat over said MERL BRoUGI-ITON,

opening on the return stroke of the piston. JOI-IN S. VOODY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

